/Engine/Source/Developer/MaterialUtilities/Public/MaterialUtilities.h
Flattens specified landscape material
Whether operation was successful
static bool ExportLandscapeMaterial ( const [ALandscapeProxy](API\Runtime\Landscape\ALandscapeProxy) * InLandscape, [FFlattenMaterial](API\Developer\MaterialUtilities\FFlattenMaterial) & OutFlattenMaterial )